The previous check returned -1 when any page within [start, start+len) is unmapped, not when all are unmapped.
Cc: Warner Losh <i...@bsdimp.com> Cc: Kyle Evans <kev...@freebsd.org> Signed-off-by: Richard Henderson <richard.hender...@linaro.org> --- bsd-user/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bsd-user/mmap.c b/bsd-user/mmap.c index 565b9f97ed..07b5b8055e 100644 --- a/bsd-user/mmap.c +++ b/bsd-user/mmap.c @@ -609,7 +609,7 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, } /* Reject the mapping if any page within the range is mapped */ - if ((flags & MAP_EXCL) && page_check_range(start, len, 0) < 0) { + if ((flags & MAP_EXCL) && !page_check_range_empty(start, end - 1)) { errno = EINVAL; goto fail; } -- 2.34.1